eta/DSI integrates a general-purpose, complete post-processor for data post processing of analysis result files. Analysis results are seamlessly imported from DSI's LS-DYNA and NASTRAN solvers to the post processor for quick, easy interpretation of analysis results. Once entered, DSI's full complement of post processing functions allow the user to graphically display and manipulate simulation result files with contour and deformation animation, contour plots and fills, and geometry deformation.
DSI's post-processing functions provide the user with numerous ways of animating and viewing the analysis results. The user has the options of animating select frames, viewing single frames, altering the time step, rotating the model, or viewing only select parts of the model.
The post processing function automatically prompts the user for the result file when activated. DSI post processes the following types of result data:
D3PLOT (d3plot01, etc.)
DYNA DEFORMED GEOMETRY (.defgeo)
HISTORY (.his)
NASTRAN PUNCH (.pch)
NASTRAN OUTPUT2 (.op2)
NASTRAN PACKED PUNCH (.pac)
DSI provides an option to create a more compact post-processing file. This binary file, called a ¡°pp¡± file due to its extension ¡° *.pp ¡±, is created after reading the result file into eta/DSI. Once the .pp file is created, the user may read this file to save both disk storage space and time when reloading the analysis results. The .pp file requires less space than the analysis result file used to create it and can be used for all subsequent post processing functions. It also requires significantly less time to load the .pp file.
DSI allows the user to generate and post process fatigue result files from within the DSI Interface.
This function is used to map the stresses, strains, and strain energy of the model across time. Animations can be edited to even, odd, or specified frames.
This command allows the user to animate displacements within the model in real time. Animations can be edited to even, odd, or specified frames.
This function maps stresses, strains, and strain energy in the model for a single step. It allows the user to view the contour values by superimposing a fill-color contour image onto the model. The values are displayed in a color legend in the upper right hand corner of the screen.
This function, similar to the CONTOUR FILL function, allows the user to check the model's contour values for a single step. A color, wire frame, contour-line plot of the component result is superimposed onto the current model.
This command displays the displacement results of the model for a single step. The undeformed model shape is displayed in white. The model can be animated to show the transition between the undeformed and deformed model.
This function displays the stress results of each individual element as opposed to the contour plot functions, which display the stress results in terms of the average stress at each node. A color legend for the corresponding color values is displayed in the upper right hand corner of the screen.
eta/DSI's TIME HISTORY PLOT functions enable the user to visualize the results of an analysis with XY plots. DSI offers a wide range of tools to manipulate the information on the display screen with labels, colors, multiple graphs, and a host of advanced filtering techniques e.g., FIR, Butterworth, SAE, scaling, smoothing, and averaging.
The TIME <--> FREQUENCY function allows the user to convert time domain to frequency domain response for signal processing analysis. The FFT equation is used to convert time domain to frequency domain and frequency domain to time domain for any graph plot.